package com.wl4837;

// 音响系统
public class SoundSystem {
    public void on() {
        System.out.println("音响打开");
    }

    public void off() {
        System.out.println("音响关闭");
    }

    public void setVolume(int level) {
        System.out.println("音响音量设置为" + level);
    }
}
